Mechanism for converting motion



(No Model.)

T. WILSON, A MEGHANISM FOR GONVERTING MOTION; ,206.

E: 5 DH Patented Apr. 24,-1883.

N. PETERS, Photo-Lithograph". Walhingmn, a ct UNITED PATENT rno an rroivwinson, OF FILLMORE, innIANA.

MECHANISM FOR com/Emma MOTION.

forming part of Letters Patent No. 275,206, dated April 24, I883.

' Application filed March 14, 1882. (No model.)

To all whom it may concern:

Be it known that I, THORNTON WILSON, of Fillmore, county of Putnam, andState of I ndiana, have invented certain new and useful Improvements inMechanism for Converting Motion, of which the following is aspecification.

My said invention consists of certain novel devicesand combinations ofparts whereby the continued rotation of a shaft in one direction isenabled to impart a reciprocalmotion to a pitman or other equivalentpart of a different (preferably slower) speed than the ordinary crankmovement. In the example shown it is illustrated asapplied to aforce-pump, but may of course be applied to any device or machine whereits peculiar operation is desired.

Referring to the accompanying drawings, which are made a parthereof, andon which similar letters of reference indicate similar parts, Figure 1is a side elevation of a forcepump to which my invention is applied;Fig.

2, a top or plan view of the same; Fig. 3, a

view principally confined to the parts embodying my invention on anenlargedscale, as seen when looking to the left from the dotted line 52; Fig. 4, a horizontal sectional view looking downwardly from thedotted line 3 y in Fig. 3, and Fig. 5 a vertical sectional view lookingto the left from the dotted line a: w.

In said drawings, the portions marked A represent a frame-work uponwhich the mechanism is mounted; B, a shaft mounted at one end in anordinary bearing, A, and at the other in a slidingbearing; C, saidsliding hearing; D, a pitman, the upper end of which terminatesinadonble rack-bar, d d,- E E, springs secured to said double rack-bar; FF, projecting arms thereon; G G, hinged levers operated by said arms; HH, spring-catches whereby the sliding box 0 is secured in place, whichare operated to release their engagement with said box by said levers;and I, a force-pump apparatus, which is shown in connection with myinvention to illustrate its working.

The frame A may be constructed in a convenient and suitable manner tosupport the mechanism, which is secured thereto byany of the ordinarymeans.

The shaft B rests in the bearings A and G, and has mounted thereon apinion, B, and a crank or other device for turning the same, 13*.

The sliding box 0 is secured to the'frainework by bolts to, which passthrough slots 0 therein, or by suitable slides. It is adapted to bemoved back and forth so as to cause the pinionB to engage with one orthe other of the sides d or d of the double rack-bar, as it operates thepitman to move down or up. It

is held in one or the other position until disengaged by thespring-catches H and H, respectively.

The pitman D is an ordinary pitman, except at its upper end, which isslotted or bifurcated to form a double rack-bar, the two sides bein gprovided with teeth on their adjacent faces, as

shown,in which the pinion B will engage, and

thusdrive said pitman up and down. a

The springs E and E strike against and press upon the shaft 13 when thepitman is nearing the end of its stroke, and thus force it sidewise,when the sliding bearing 0 is released and permits. force the shafttoward the rack portion at when the pitman has reached the top of itsstroke,

and thus throw the pinion B into engagement therewith, and the spring Eoperates, when the pitman reaches the bottom of its stroke, to force theshaft B toward the rack portion at and throw the pinion into engagementwith that portion. By meansof this successive throw- The spring-Eoperates to ing of the pinion back and forth as the ends of the strokeare reached, a continual engagement between it and one of the other ofthe two rack portions is effected, and a continuous reciprocal movementof thepitman thus s ecured by a continuous rotation of the-shaft 1n onedirection.

. pinion out of engagement with the rack portion d and into engagementwith the rack por tion 0?. The arm or projection F operates 1n a similarmanner through the hinged lever Gr upon the sprin g-catch H, and permitsthe parts 0 B B to execute the reverse movement to that just described.

The spring-catches H H operate to catch and hold the sliding box 0 untildisengaged by the operation of parts herein described. As shown in thedrawings, (most plainly in Fig. 3,) the catch H is holding the slidingbox, and through it and the shaft the pinion B, toward its side of themachine, thus securing said pinion in engagement with the rack portiond. WVhen the sliding box is forced toward the other side, the catch Hengages therewith and holds it just as securely in that position.

The pump portions I are simply shown so as to illustrate a completeworking-machine, there being no intentionto limit the use of thisinvention to a pump, although it is peculiarly Well adapted to use inconnection therewith.

As will be readily understood from the drawings and the foregoingdescription, the shaft B makes several revolutions to each stroke madeby the pitman, and therefore the pitman is driven with agreatly-increased power over what is produced from the ordinarycrank-connection of pitmen with shafts when the length of the stroke isconsidered. As will also be seen, any desired length of stroke can beobtained by simply increasing the length of the rack-bars. This is ofgreat advantage in such uses as heavy pumping, as from mines, &c., orwhere a large amount of water is to be raised, as a long and powerfullift is there much more engage said catches, and means whereby saidshaft and pinion are moved from side to side as said rack-bar reachesthe ends of its stroke, substantially as set forth.

2. The combination of the shaft and pinion, the internally-tootheddouble rack-bar, and springs E E on said rack-bar,which as said rack-barapproaches the ends of its stroke will engage with said shaft andoperate tor throw said shaft and pinion from one side to the other,whereby said pinion is caused to engage with first one side and then theother of said rack-bar, all substantially as set forth.

3. The combination of the shaft and pinion, the sliding box 0, thecatches H H,the levers Gr G, the arms or projections F F, and thesprings E E, all substantially as set forth.

In witness whereof I have hereunto set my hand and seal, atIndianapolis, Indiana, this 11th day of March, A. D. 1882.

THORNTON WILSON.

In presence of- O. BRADFORD,

OHAs. L. THURBER.

